vIOLETA

Neutrino Interaction Observation with a Low Energy Threshold Array

a Reactor Neutrino Experiment based on Skipper-CCD technology

Technical description

Skipper-CCDs are able to achieve an readout noise as low as fraction of electrons. These detectors are developed by the MicroSystem Labs of Lawrence Berkeley National Laboratory and operated at Fermilab. They open an unique opportunity to detect neutrino interactions, that transfer a very small quantity of energy to the Skipper-CCD silicon. A part of the transferred energy is converted in a very small amount of electron-holes pairs that can be easily counted with a Skipper-CCD.

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Performance

Measured readout noise as a function of the number of non-destructive readout samples per pixel for the Skipper CCD. Black points show the standard deviation of the empty pixels distribution as a function of the number of averaged samples. The red line is the theoretical expectation assuming independent, uncorrelated samples. The number of readout samples can be dynamically con figured.

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Reading

Here you can find an animation describing how a Skipper-CCD reads the charge in each pixel. In the last step, when the charge is placed at the sense nose (SN), it can be measured repeatedly in a non-destructive way

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Low Threshold Acquisition

Extensive use of the Skipper technology was limited by the lack of specific equipment intrinsically designed to operate the sensor at the ultimate performance. The Low Threshold Acquisition controller, so called LTA, was developed by research groups in the USA and Argentina to tackle this problem. Those groups are now part of vIOLETA collaboration.

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vIOLETA is a future experiment that will measure reactor antineutrinos and their physical properties through two channels: neutrino-electronic interaction and Elastic Coherent Neutrino Nucleus interaction. This experiment will use the new Skipper-CCD technology that achieves sub-electronic readout noise and a detection threshold in the eV range. Two positions were identified to place vIOLETA within the Atucha II Nuclear Power Plant in Argentina, 8 and 12 meters away from the center of the reactor core.
About vIOLETA
Aguilar Arévalo AlexisInstituto de Ciencias Nucleares of UNAM.Mexico
Arenillas Pablo Laboratorio de Metrología de Radioisótopos (CAC-CNEA)Argentina
Arnaldi Horacio Laboratorio Detección de Partículas y Radiación (CNEA/CONICET/UNCUYO)Argentina
Avalos Nicolas Laboratorio Detección de Partículas y Radiación (CNEA/CONICET/UNCUYO)Argentina
Ave Maximo Physics Institute of the São Paulo University (IFUSP)Brasil
Balpardo Christian Laboratorio de Metrología de Radioisótopos (CAC-CNEA)Argentina
Bellino Pablo Experimental Reactor Physics Division of the CNEA at Centro Atómico ConstituyentesArgentina
Bertou Xavier Laboratorio Detección de Partículas y Radiación (CNEA/CONICET/UNCUYO)Argentina
Bessia Fabricio Alcalde División Dispositivos y Sensores and the División Bajas TemperaturasArgentina
Blostein Jeronimo Neutron Physics Department of the Centro Atómico Bariloche (CAB), National Council of Science and Technology (CONICET), and Instituto Balseiro (UNCuyo)Argentina
Bonifazi Carla Physics Institute of the Federal University of Rio de Janeiro (IF-UFRJ),Brasil
Botti Ana Martina Physics Department of the Universidad de Buenos Aires (UBA) in ArgentinaArgentina
Cababie Mariano Physics Department of the Universidad de Buenos Aires (UBA) in ArgentinaArgentina
Cancelo Gustavo Fermi National Accelerator LaboratoryUSA
Cervantes Brenda Aurea Instituto de Ciencias Nucleares of UNAM.Mexico
Chavez Claudio Universidad Nacional del Sur (UNS)-CONICET,Argentina
Chierchie Fernando Universidad Nacional del SurArgentina
D'Olivo Juan Carlos Instituto de Ciencias Nucleares of UNAM.Mexico
Daneri Florencia Physics Department of the Universidad de Buenos Aires (UBA) in ArgentinaArgentina
Depaoli Eliana Laboratorio de Metrología de Radioisótopos (CAC-CNEA)Argentina
Derylo Greg Fermi National Accelerator LaboratoryUSA
Estrada Ezequiel Laboratorio Detección de Partículas y Radiación (CNEA/CONICET/UNCUYO)Argentina
Estrada Juan Fermi National Accelerator LaboratoryUSA
Fernandez Moroni Guillermo Fermi National Accelerator LaboratoryUSA
Gomez Berisso Mariano División Dispositivos y Sensores and the División Bajas TemperaturasArgentina
Izraelevitch Federico National University of San Martín (UNSAM) and the National Council of Technical and Scientific Research (CONICET) and CNEAArgentina
Kuk Kevin Fermi National Accelerator LaboratoryUSA
Lathrop AndrewFermi National Accelerator LaboratoryUSA
Lipovetzky José División Dispositivos y Sensores and the División Bajas TemperaturasArgentina
Lovino M.B. Laboratorio Detección de Partículas y Radiación (CNEA/CONICET/UNCUYO)Argentina
Machado Pedro Fermilab Theoretical Physics DepartmentUSA
Makler Martin National University of San Martín (UNSAM) and the National Council of Technical and Scientific Research (CONICET)Argentina
Martinez Gabino Lucio Jose Experimental Reactor Physics Division and to the Radioactive Waste Management National Program of the CNEA at Centro Atómico ConstituyentesArgentina
Martínez Mauricio Instituto de Ciencias Nucleares of UNAM.Mexico
Martinez-Soler Ivan J. Northwestern UniversityUSA
Molina Jorge Investigador, Facultad de Ingeniería – Universidad Nacional de AsunciónParaguay
Mota Philipe Physics Institute of the Federal University of Rio de Janeiro (IF-UFRJ),Brasil
Nasteva Irina Physics Institute of the Federal University of Rio de Janeiro (IF-UFRJ),Brasil
Paolini Eduardo (UNS) and Instituto de Investigaciones en Ingeniería Eléctrica “Alfredo Desages” (IIIE),Argentina
Perez Martin División Dispositivos y Sensores and the División Bajas TemperaturasArgentina
Perez-Gonzalez Yuber F. Northwestern UniversityUSA
Piegaia Ricardo National Council of Science and Technology (CONICET).Argentina
Rodrigues DarioPhysics Department of the Universidad de Buenos Aires (UBA) in Argentina, CNEA, CONICET.Argentina
Rosauro-Alcaraz Salvador Instituto de Física Teórica at the Universidad Autónoma de MadridEspaña
Sarkis Mobarak Youssef Instituto de Ciencias Nucleares of UNAM.Mexico
Sidelnik Ivan Neutron Physics Department of the Centro Atomico Bariloche (CAB) and the National Council of Science and Technology (CONICET)Argentina
Sofo Haro Miguel Laboratorio Detección de Partículas y Radiación (CNEA/CONICET/UNCUYO)Argentina
Stalder Diego Investigador, Facultad de Ingeniería – Universidad Nacional de AsunciónParaguay
Stefanazzi Leandro Fermi National Accelerator LaboratoryUSA
Tiffenberg Javier Fermi National Accelerator LaboratoryUSA